Boiler cleaner



Original Filed Nov. 2, 1921 '7 Sheets-Sheet l E INVENTOR.

4254/12."! P0160 v v/ ATTO NEY.

G. l. RAWSON BOILER CLEANER Sept. 13, 1932.

Original Filed Nov 2, 1921 7 Sheets-Sheet 2 I N VEN TOR.

ATTOk EY.

Spt. 13, 1932. I RAWSON 1,877,722

BOILER CLEANER Original Filed Nov. 2, 1921 7 Sheets-Sheet 5 I N VEN TOR.

ATTORNEY.

Sept. 13, 1932 G RAWSQN 1,877,722

BOILER CLEANER Original Filed Nov. 2. 1921 7 Sheets-Sheet 4 INVENTOR.

A TTORNEY.

G. I. RAWSON BOILERCLEANER Sept 13, 1932.

Original Filed v- 1921 7 Sheets-Sheet 5 G. l. RAWSON BOILER CLEANER Sept. 13, 1932.

Original Filed 1921 7 Sheets-Sheet 6 INVENTOR. femvrf Pal/Jew I f fl 1. 8 m

Sept. 32- 6.1. RAWSON 1,877,722

BOILER CLEANER Original Filed Nov. 2. 1921 7 Sheets-Sheet 7 INVENTOR. fem rffipmy /v A TTORNEY.

l Patented Sept. 13, 1932 i i u i 13611.33 cLiiLeNiaa be, PI Q TRbIT, mc emy smm meimm m 093mm;- TI IqXd AMEeI A,ornnrn om ICHIGAN g I Myiinventioli ireleteslto new and useful im 1 Fig.8 isa' vieiirsimilar to Big; e showing provements in boiler cleanersiandhas for its 1 object the 1 provision of i an automatio boiler 'c1eaner,arranged to operate 5 automatically at 1 fire-determined;intervals and so cor strueted asto prevent the delivery of eleanlng fluid at improperintervals againsteriy particular vide an automatic means for expelling moisture from the1 main heacler of the blower sys? tem previousltothe blowing operationand to "heldwo eni a a 11.1" 1 5 Another objeet oi the inventlon s h P ision in a boiler cleaner designedito operate olose in said adera drain valve normally i automatically; of means tor insuring prompt a and eflioieiit closing of valve positloned 1n the maiir header so as to' prevent delivery of eleaning fluid to the boiler in casethe operetingmeahs fOr theblower system should be- Ahother object of theiinivention is theiproa 1 The invention} consists in the: combinations 1 i and; arrangements f parts; hereinafter (1e; 'i dendelaimedg i I e b The invention willbe best under t d b reference {to j the acoompa ying drawings "74 which form a Quip pier; viewer thex iuverition. Fig. is a sectional view takenon sub- K sectionailflvi'ew takeh oujfsub vision inthe mairiheederof'a slowly opening Valve so astoeausee slow and gradual def liveryof eleaningifluidtothe main header, so as to eause lel gradual :Warming up otthe same andyexpulsiouot moisture therefrom.

" the r objects-Wilt appear hereinafterg the tripih inoperative position.

Fig. 9 is a perspective View of the tripiused in the invention; i

0mm drum used in the invention. w w

\Fig. 11 is a vertical. cross-sectional View a a mofthe drum used in the invention. w E Another bject ofthe inventiomis topro i Fig. 12 isyal diagrammatical viewiof the invention showingitsilayout 1 Figure 13 1sadiagrammatioviewtshowmg the drain valve in itsrelation with the supply pipeanclthe blower units."

a Figure 14: is semi-oliagrammati c feleyalilOllELl VIGW of the. motors anclswiteh meohan sm for operating each of the-respective blowers. a i i l By invention 1 I have dQSQlgIlGC l overcome some icliliieulties which have presented themselves in automatic systems of- {soot blowers. With automatic systems 1 0e soot blowers, as at present n use, =itf1s customary to the, blower unit which projeotsintol ithe opened and closed by a am which rotates rotation of the unit is efiecteclby a motor.

touse a cam actuatedw valve foreontrollingg the delivery of steamgforother cleani rigifliiid i synehronously with the blower unit. The

While the cleansing fluiol= is beingvprojeeted a from the blower unit, it is neoessarythat the unit be in rotation, so that there may be no prolonged blowing from the unitagainst part of the boiler. Ineasethehiotornshould 3 become disarrariged. while the valveiis operied and While the fluid is being projected from theunit, the tubes ofthe boiler might be very quickly seriously clamaged were there not someway arranged to automatically shut off the supply of fluid to the imitklgThis idifriL j onto thectubes thereby oausirigithqsoot and i ashes clinging thereon to bake oh) the i tubes.

uculty I have overcome biy providinguan automatic means for closing avallive in themain y 7 header when any clisarrangement taikesp laoe j .said valve sopthatstea n-passingftlirougli,

main header which permits a small amount of steam to pass through the header, thereby warming the, same up'and expelling the moisture from the open endvo fthe headenwvhieh rra d t e l sed-by m ans lw ii c q s Iiotffiect' a closing until afterf sufiicient cleansingfiuidha's passed through the 'niain header temps the moisture therefrom and [warm the header up so asto prevent con-f densatlonthere n. ,J The; nventlon C'OIIIPIISGS a base '15, pronected' to a yoke 41 carried 1 on the upper end" suitable bearings mounted on saidbas'eq: Said suitable hearings supported.hyjbrackets 2 anolufztij';projecting-upwardlygfro n said base. i :Saidgear 22"has;fixedlyasecuredto one of its;

' faces, a" cam 26 which engagesa rolleri28 loosely-"mounted on' theireeendoi a-1ever-Q'Z.

The :opposite end:oflever27Iispivota1ly conof a stem 42' ,for controllingthe elevationof the fulcrum-point of lever 27 as willllater he apparent. ,Saidlever 27 is :pivotally secured, rintermediate lits 'ends; "to a stud 29 which passes through an eye-iorniedin a lever 31; a spiral spring ibeingfpositioned'uponsaid stud "intermediate said lever 27 'and said lever 31.

V Lever 31 is fastened pivotally atits opposite 9 endtol'anjupright 32proje'cted fromthehase 15.; :gPivOtarlly attachedto the lever "31, inter Inediate its'ends; is afvalve sten133'designed to operate the valve 34which is interposie tioned in a pipe35 whicheon municateswith V I the main header :A pipe 36con11nunicates fwith the-valve 345 and1 leads to a drainvva lve' '34P interposed inthefheader 39. This drain Valve is: normally held open hyta spring 34:? in v the usualfmanner and the pipeBG cornfi *valvewstemBt and causethe drain valveto close against theitension of the spring which" normally holds it open, Pivotally secured to valvestem 37'which projects into thevalve the lever 27; adjacent ns .end thereof, is a v 38 positioned in the mainFheadenEQLand de:

signedto control the passageof fiuidthrough said header. A spiral springdissecuredto said lever 27 and. to a collar 41 fse cured to i l the headerea fPivotally rhounted at one end the bracket :1sa lever 42, Jtheoth'er 421$; 'FiXedly "mounted "upolithe' it stein 4-2)? is I p I fi5 ifPivo tedito the'lowei jend'of the paul or is controlled by admin valve normally held open. "In this'inv'ention the"drainvalveis being 43 on whichispivotally mounted at i one endja trip or paul 44, said stem beingslideahflylpositioned in ablocl: 45 Whieh is 1 secured to a basee'Z, said base 47 being mount I ed upon the header 39 by means of. a U-bolt trip 44', is: the core 48; of the solenoid 50,"said moved away from the edge of the member 45 (10113 5 43 "and the fulcrum point of lever 27 .perlnitting n spring 40 to closew valve 38 :i1'1d springLBOfto close-'valve34. 51'

ingofthewheel'22 through driving. 17,the.ca1n engages the roller 28and thereby header'39 by thevalve ,8 bufore the valve 13 i eientaniount of steamto pass through the pipe 36 toelosethe-dtain valve, xlWhenzthe device is in operation;the ripaiil445s in the positien sh'own-inFigure: 6,whe1ieby1thefu1,- crum L41 of the leverz2 7 is elevatedrrelativeto thopositionshoivn in Figure 8. It ;is. on the i fulcrum elthat the levers? operates inopen ing the valvesl38 and 341"? Thesprings and V serve toclose the valvesswhe'n the roller 28'15idesofi of thepperiphenv oftheca'm 26..

3 shown in Fig; 1 2,vitis desi gned to'oper- ,ate thedevice some; cloelwsystein although 7 itis not necessary be hand-operated by ;10s1ng the switch menu ally instead of hvthecloclt. f AsWitch is V i a prov1d'ed into Iwhich Q-Ieadkthe: positive and negative wiresrespectively 52 and 51. Awire 53 leads "from a the switch and communicates with contact member 84, thepurpose of which i will he explained later This wire53 also is a connected by means of a wire 55 to thevsolem o-iai ad ns f nit e heli e of th switch 50is awire 56, whieh connectsftoa core projecting through said solenoid and having a spiralspring l9 positioned'thereon, normally: retainingksaid' paul or trip inlIlH operative position asshown inFig. 8. When; in; inoperative position the shoulder 44" is assh o v vnvin Figure S thereby lowering the 1 a wTheweonstruction .ispsueh that upon mm.

the motori'hecomesufullyopenedsoas tojallow; a sufliinasmuch asvtheidevi'cemey "1:

oontact n e nhercol, nember 57 being so I positioned as to brush against the inetallicq bandGQ positioned npon the drumfiOi is mounted on the"shaft23;

ed by means of awire 59 to the clock 59. I

The wire'63 leads to.theinotorfl'z andiscon connected ""hy'a wire 6210f the solenoid 50.

to serveasia hrush i11 continiious hand-"61 positioned uponthe sihe'icontact member 157 is meantremise ed iipon ahhtihmg ntrormss wiser-1&9;

postiond upon-pedestals 658" which are 8 etired t6 the base 1 56. Contact member 70" is likewise inounted 011 platform 58 end designe 1 through thewi-re 76 toc1 osetl 1e circuit le'eding to the motor70 used. jtedrivea 6 particular hlovverflinit. r r

member? 1" is mounted on theinsulating plat Similarly {contact 1 6 form 58end is designedthrough the Wire'TT to los th cireuit lezidingto th e niotor 71;. Likewi e the other contact inembers72"; 73 6 v -74, a'nd 75 are finourited; "on the insulating Platforrn Siziihd are designed to close thefcir emits ofthe=n 1 wrs72,673 Mend 7 5 through 1 the wires 78 3 79, 80mm 81 respectivelyk;

r It is to be noted: that the Wire 63 is con- :nected through switches 64;, 65, 66 6 7, 68 and i kw 1 69 with thernotors filsed for driving the: units mid wire70 leading from saidswitch (n w the motor 70512, Wire 71" leading from the switch 65to" the motor 71, a Wire 72'" leading gfromtheswitch 66 to thelnotor 7 2, at Wire73 6 leading from the switch 67 to the motor 73,

r Wire 4; leading from fltheswit'ch to the It is to be noted thhtthe assessm s3 Ptvhich servesfas a brush iipon the continuous f ban'ct82 lpositionedi pon the drum 6 6 6 i the motors tised to drive the unity Theconran the metallic member 82 isconnected by r thevvire-53 tothe switch anctbye wire ,6 to the solenoid 50, thereby closing the heir-6 It is tobenoted "that'inelnber is inter rupted but is shor t -circhited to the member 72E 73" and in the course of the rotation 6 of the drum comeintocontact preferably fstlccessively WithCOIltHlCtTl'iGli'lbGIS 86Whi ch 66 engages successively Contact member 86 sirnijlarfto that shownfor contact member 73 in Figiire t, 10] showsthe nanner of 1 "coiinecting contactniemhersf86 throhgh the 6 (1min withfthe contact strips 60j and 61 and thuswiththeleedhti from switch 50'. Fgroinf 6 thisgvietv itflvill benotectthztt thevcontact members 86 are respectivelyconnected by the con d uctors 868 to, the central conductor 87 end that this central conductor extends subste ntiallythe entirev length of the drum. 1 As 1 each contact-, member successively engages the smell: strip "86,"the circuit through the 6r IfiOtOIz driving o its 6 respective unit 6 is closed h ll O r isfthereby antoinatically set r intoioperetion rotate the unit. j i i i 1 When the clock makes the contact; theinotor 17 is 'set into operation, causing the drum to rotate'fron1 the 1 osition shoWnin Fi 2 so i v y b 7 that the contactmernber 57 engages the Inetallic strip which isshort circnited t0 the H continuous inetallicstrip 61, thereby afford-v 1 ing a closeci circnit through the motor 17 at he'll the clock breaksits connection; The

ruptectportionof the band 601 I iistobe noted thattheso1en0id=isa1so ,lnagnetized at the 'smne tinieithe motor 17 begins to "rotate, sothat the trip 44; is moved into close engegcnientegainst the s ideof the n1ef1nber45; thereby loc -king the fulcriim 41 'i'orthe enchof the lever 27 which esshovvn in Figure 6 is elevated relative to the position is motor, 17; therefore, W111 continue to; rotate I untilthe contactineniber57 reaches-theinter- I shown in Figure 8. WVhenever the ciroiiit is broken while the roller 28 is in engagement with thecircular portion otthe periphery of the cane 26, the solenoid will he de energized endthe spring 9 will cause the member i to disengage froniineinber 45 thereby lowering the fulcrum pointof lever 27 fromthe posit on shown in F gure 6 to that shown in Figure 8, thus eliowingthe valve 38 to be closed in response to the'tension of thespring 40. 6

The switches6 hw, 66, 67, 681and 69 are pieced in such positions with respect to their respective chins which open the 6 respective valves which permitthe delivery of fluid to the respectiveblower units, 261s to frethin said switohesfin closed positionsaslong es there- 6 SPGCtlVGVELlVQS areopen. "The structure for accomplishing this is clezirlyQilllustrated in Figurelf- Byreterence to this figureit vvill he noted that the 1notor is adapted togd rive the to engage the valve stem 1119011 rotation of the blower elenientend to thereby depress andopen the valve 106inthesupply pipe 107 i For etfe'ctinge closingof theswitch 64 ,blower e1e1nent10l through a worm 102 end a geer-103niounted ontheb1oWe relement. 6 A czun 104 carried by the gear 103 functions 6 i upon the opening of thevalve 106 there is provided 21116317111108 rigidiyczti'riedby the valve stem 1 05 and thiserm cerries at its outer free end," a contact 1091*afc1apt-ed to bridge the contacts 110 andlll oftheswitch- 6 1. it will thiisbe seen thatoperetionof the hlovver element byfthe inotor 70 Wi11ca1 1s e theca n 104 to engage v a1veste1nf105 to open the valve 106 and toclose the svvitch64. Ob viously when the flattened portion of the cainj approaohes the valve stem, the spring 112 1 Considering the operation of,-for example, 6 the motor"? 0 in its relation to the general hrrengenient andby reference particularly to' FiguresIQ and 14, it Wilt benoted that when w ll tendItoc1osethe valve and -;contaet 7 l engages its respective "contact eurrent Will momentarily be. supplied tothe motor 170 through the conductor, 53, contact 77 70? and gconductorw'ifi onatheother; hand.

, her 82, contact8'3 andfconduetor 83 I on one hand and conductor 63, switchixfie, and conductor 7 O I: on the other hand. 2 It. will thus v be'seen LthatWhilethedrum GO'Qin'itially :closesthe circuit to the motorf70 thatgthe cir- *cuitto thismotoriis Inaintainedclos'ed by the f rThjis. Will start the'rotation of, the inotor 70 i flwhereupon ca'm 104 illopenvalve 106 and v ued rotation-zof' thedrunii60? thecontaet of rnember 170i with contact-'86 will; be lo okenrso felose switeh'64c. Ob'viously upon the contins that the InOtorWO- ill notlonger obtain cur,-

rejnt through the conductors. aforesaid;

f' However when 1 this condition is reached,

through ,the Conductor 53,- contact 84, Qrnem In the further ioperat-iongfloif structure andby reference particularlyto Figure 1, it 7 will-be notedthat when the motor 17 is operjati'ng the solenoid will he"energizedv and thesfulcrurn 4L1 ofthe lever'2 7 will-heinthe position shown in Figure 6;! 1 This will raise the one end-of) the lever '27: and the other end of the. le'ver27 Will be' raised hythe riding of 7' the roller 28"onf'thel circular portion ofythe j Obviously upon otatlon ofthe cainh to r1 49 1 "vent; damage of the boiler tubes should any cam 26; This vvill cause an opening of the valves 34; and 38inthe manner brought out ebefo're andit will be noted that neither of;

these valves willbe opened V until both of the1ever27 are raised, 4

point where the cutout portion engages the roller. 2'8thearm 27 will be lowered to such' anextent; as to perm-it closing lof theyvalves V and 381105 the springfiol nd o respetciw tively, j; a v

- The "s0len0id m5Q servesas a 1 Ineansto prefgartkof {the} system become disarra'ngedl ineefit isiobviousthat both ends of thelever I Q'Tmust be raisedto actuate the valves 34 and 38,:it is oloviousthat the endof the lever27 hich is fulcrurned as at 41, is lowered, then the (valves will. be closed. In the operation 1 therefor, upon disarrangement ofany portion of the. electrical system, suchffore xampleas the failing of motor 70, the main .fuses the entire systeIn-Willbeblovvnwhereby 'j the solenoid 50 Willbe de-energiz ei-the fulcrumedend of the'levrQTwill be lowered {andjthe' valve's 34cand38 Will be losed. 'Re

ferring to Figure 13 vit ill benoted that when the valve 38 is closed the drain, valve B lflwill he' open whereby theblower units l and (piping .leadingithe'retol ill be drained.

Onopening the valve 38.1301: asm'all amount a .17.? no 3 the system;.is vvarnied up, the condensate es- 1 claimis new and; ters -Patent,;1s:

builds up sufficiently; to close .valve 341?. By

' eaning by waytr valve ar with at Ipressfir i construction set forth but desire toavail self of such modifications andj' changes -as Thus, any orient the contacts'86 on vthe druni Inight: be electrically connectedfto a l conielwithini thePscopelof thefappended claims." fFurther, qvvhifle the, inventionhas i been described as'beingfembodied: in'a bo iler 33g} fele-anerIforel'eaning partsof a boiler, it will V V heapparent thatthe invention vvillfilidequal ,utility'infdevices for'oleaningisiniilartypes ofapparatus andfit is to he therefore under-7;? stood; that the term fboilerfi wherever used i i oin the specification or olaimsfli'srto be con lfi 1 strued as meaning a heat transfer appara; tus or fluid heater of any charact-er,while the term boiler cleaner r is to becon strued -as] ineaningacleanerfor anyg suchapparatus",' f "It Willgbe obvious that; if desired, the above deseribed control systelnniay-he 'used 1 I, V to' control the operation ,ofla; pluralityTot cleaningsystemsfor a plurality ofaboilers motor similar tojthe motor 17 but, associated with the cleaning-. system: of a; second boiler,

wherebyj this contact would ,function lI1-i13 inannerv similar to the' clock 59 to momem tarily startthejactuation-foii the-second motor which would drive a secondv drum in the same manner: as 60'. a

Havingthus descrihedjinyinvention K desire to, seeure-hy Let a 1. 1111 a sootjblovving svstein the inotor 17 drives'g-drum I ,a'imain header: {an p al r' fwblower i units communicating" there ith,- means for rotating'ea'chiof said'units, meansfOr actul- 'ating the said rOtatingnieanS; control means in saidheader; a normallyopendrain valve in said l lead'er; means for, closingsaid drain valve; andmeans ioroperating said header T control means synchronouslyflwiththeac egation ofsaid closing meanatheioperating" of said header control means heingfincipient- ,ly, more rapid than thelaotuationiof said closing meanslf I 2 In a fsoot blowing'sj stein, a plnralitv vof blower units, m0tors"for separatelyxro .tatively driving the'units, a movable contact ,ca'rrying circuit eloserfjfor saidgmjotors, inain "valve ,icontrolling the fluidfsup plyito .said units, a normallyopendrain valvecon ftrol means forsaid n ainvalve-and drain valve, andfafcommon-drive ineans forsaid circuit closer and fforsaid main and valve controlhng n ear'is.

3. In asoot'blower system,a hlovver drain a main cleaning fluidheader, a drain valve for said header,f a r control ,valvel for said 7 header, an-lndlvldual controlvalve for cone f" o I a s n tion to the control means forsaid lndividual asmgzza;

trolling thevsu-pplyu ofcleaning fluid from:

" said header to said blower: unit, an auxiliaryvalve-wfor controlling. the: actuation ofi said 1 drain valve, automatic, means; including a rotatable drumi for controlling said individual valve, means tlllClfllCllIl'gf, a cam for auto it matically controlling, said header :c'ontroh ling valve and said auxiliary valve intimed relationto the control means for the said (inbfidividual valve and aflcommon shaft ll lgflsilldl drum andxcam,

carry- 43 In a soot blower system,

draining, the blower units duringperio-ds Of 110II-llSe0f the blower units, and: means including an auxiliary valve controlled by the saidimainvalvcontrol'means for closmg the dramwvalve after a predetermined tlme tollowrng thetopenlng of the said mam Inca soot blowersystem, a blower u nit,

a main cleahingfluidheader, a control valve for said jheade r, anvindividual; control valve: ed tor controlling the supply of cleaning fluid dividualvalve, a drain valve for draining the blower unit, and means including an from said header to saidzblower unit, automatic control means 1 for said individual valve, and meansfor automatically controlling said header-controlling valve in timed relation to the controlmeansfor the said in the blower unit during-periods of non-use of auxiliary valve controlled by the said main fvalve control means, for closing the drain valve after a predeterminedtime following the opening of the said main valve.

62 In a soot blower system, a blower unit,

, amain cleaningfluid header, a control valve [in said header, an individual controlvalve for controlling the supply of cleaning fluid from saidheader to said blower unit, auto- Inatic control means for said lndlVldLlELl valve, means for automatically controlling 'said header controlling valve 1n timed relavalve, a drain valveffor draining the blower unit during periods of non-userof the blower it a main header having a plurality of blower units communicating therewith, means for 1 rotating each of said units, means foractuata plurality of blowerauiits, a'mainscontrol valve-fon all of v said units, individual control valves for the, "several units, automatic control means for: ,each of said individuallivalves, means for, I automatically controlling said main-valve. intimedrelationutothe control means for the individual valves, a drain valve for ing 'said rotating means separately; means! for moving said actuating means, a control valve mounted in saidyheader, drainvalve in header and means controllingthe operation of said drain valve and mechani-' cally connecting said control valve and actuating means for opening said control valve and for eltecting anactuation 0t saiddrain valve upon the movement of said actuating means. i it f S In asoot blower system, amainheader,

a plurality of 'blower units communicating withsaid main header, a normally open drain valve for saidheader, a main valve for controlling theflow otcleaning fluid to said header, a by-pass around said main valve for conduetmg cleaningfluid to said drain valve to close the same, and an auxiliary valve controlling the flow of fluid through said 9. In a soot blower-system, a: mainheader,

a plurality of blower units communicating with said main header, a normally open drain a valve for saidheader, a main valve for controlling the flow of cleaning fluid to: said header, anauxiliary valve torrcontrol ling the flow of cleaning fluidto said drain valve to close the same, anda' common means for actuatlngsaid mam valve and said auxlhary valve. v v u v 10. In a soot blower system, a main header,

a plurality of blower units communicating with said main header, a normally; open drain valve for said header, amain valve for controllmg; the flow of cleanmgfluid tosaid header, an auxlllary: valve forcontrollmg valve to close the same, and acommon means tot for actuating said main valve and. said auxiliary valve, said lastlmentioned means mcludmga fulcrumed lever connected intermediate its ends to the said main valve andtheauxiliary valve; i

11. ,In, ,a soot blower system, a main header, a plurality of blower units communicating with said main'header, adrain valve forsaid header, a main valve for controlling the flow of cleaning fluid to said header, an auxiliary valve for controlling the flow of cleaningfluid tosaid drain valve to close the same, and

a lever for actuating said main valve and said auxiliary valve, said lever beingposh tioned' to actuate-one of said valves more rapidly than the other.

12; In a soot blowersystem, a main header,

a plurality of blower units communicating with said header, an electric: motor for each of said blower units, a main valve forcontrolling theflowof cleaning fluid to saidrnain header, axnormally opendrain valve for said header, an auxiliary valve for controlling the flow of cleaning fluid tosaid drain valve=toclose the same, a lever for actuatinggsaidmain valve and said auxiliary valve, and meansyfor rendering: said lever; operative: lIlmSYHGhIOr nism with thesupply of electric I current to l I said motors associated .withsaidunitsw A 13; In a sootblower system; a main. header, a pluralityof blower units. communicating fl with said lieadenanelectric motor for each of said blower un1ts,a main valve for corn trolling theflow, of cleaning fluid to said main header, a normally openxdrain valve for said header, an auxiliary valve for con- 1a.. In a-boiler cleaner, movable blower an, element, means for moving said blower ele-. I .ment, a valve for controllingthe flow ofcleaning fluid to said blower. element, and plural means operatingto hold saidvalve open dur- 111g movement of said blowerelement byv said; 2 blower element moving means, jone of saldplural means ,operatingto close said valve v upon failure of said blower element-moving means tomove saidb'lowerelement irrespec- V tiveof thep'osition of the other of said-hold e9 ingrmeans. i

, 15. In a boiler cleaner, a mor/able blower element,electricallyactuated means for moving said blower elementfa valve for controlling 'the'fiow o fcleaning'fiuid'to the blower 551: element, and plural meansv for opening-said valve upon the closing of a circuitthrough said electrically actuated blower element moving-means: and iorholding said valve open durmgmiovementoi said blower element,

one. of said plural Lmeans operating to. close said; valve upon the] shorting of the electric circuit through the blower element actuating,

means irrespective of the position ofth'e other ofsaidholding means.

16. In aboiler cleaning system, a plurality ofl'blower elements, electrically actuated.

means for controllingthe actuation of said blower elements',a main valve for c-ontrolllng the.flow of cleaning fluid to all of said blower 95felements, means operableto Open said main valveactuated bythe energization jof sald electrically actuated means,andgmeans operable :to close said main valve upon-the interruption of the How of current to the-system.

.53 17 Iii a boiler cleaner, arotatable blower elemenfimeansfor rotating saidblower element, a valve for controlling the flow of clean.

ingfiuid to said blower element, alever for actuating said valve, and means for render- 60Jijng said lever inoperative to provide for closing of said valve upon fail'ureof said 3 for'rotating said blower element, a valve'for V controlling thefiowof cleaning fluid to Sfild blowerelemenhmeans including a lever for actuating said valve, and means electrically. connected in the circuit with said electrics motor for rendering Lsald lever inoperatlve to provide for closing. of said valve upon shorting ofthe circuit throughthe said motor. 1

,19:'Inasoot cleaningsystem, a plurality V of'blower' units, a main headenfor supplying ,7? {cleaning fluid to said'blower units, avalve in said main header, an electric motor! associated-with each unit-for rotating the same, 1' arotatable drum, aplurality of contacts on saiddrum arranged to successively'close: the

circuits throughsaidelectric motorsxupon. r rotationof said,drum, and meansmechani- H cally connecting said rotatable I drumto. said l valve to actuate the latter upon rr'otation of the drum.

20. In a boiler cleaner, a blower element,

header for supplyingcleaning fluid to'said blower element, a-norinally open drain valve forsaid header, a main valve for controlling the flow of cleaningflu-id'through said'header,

and means for closingvsaid drain valveupon the expiration of a predeterminedtimeinterval afterthe'opening of said main valveto i provide for draining the closin ot said drain valve.

21. 111 a boiler cleaner system, a plurality of movable blower elementa -means associ ated witheach elementforimovingthe same, power; actuated control means for said ele-' ment moving means a cleaning fluid supply of said header prior l header, acontrol valve in said headerfactu-fatmgmeans for said 'controlyalve actuated l byithepowersupplied to said power actuatedcontrol means, and means to automatically close said supply valve upon the interruption of power to said, power actuated control means. r

22. In a boiler cleanerjsystem, a plurality of movable blower elements, means associated with each element for moving the same, 3

power actuated controlmeans for said elenent'movingineans, a cleaningfluid supply header, a controlvalve in said header, a drain valve for'said header, actuating means for said controlvalvea'nd drain valve actuated by the power suppliedto said power actuated 1 controlineans, and meansgto automatically close said supply valve upon the interruption of power r to said power In "testimony County ofWayne and State of Michigan.

7 p LG RANT I. RAWSON.

7 blower element rotating meansto rotate said r blower element.

18'. In a boiler cleaner,- a rotatableblower 55 element, means including an electric motor:

actuated control whereof, have hereunto signed the foregoing specification, at Detroit, 

